2001-12-06 13:10:51 +01:00
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/* Copyright (C) 2000 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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2006-12-23 20:17:15 +01:00
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the Free Software Foundation; version 2 of the License.
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2001-12-06 13:10:51 +01:00
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This program is distributed in the hope that it will be useful,
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2000-07-31 21:29:14 +02:00
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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2001-12-06 13:10:51 +01:00
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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2000-07-31 21:29:14 +02:00
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/*
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Static variables for mysys library. All definied here for easy making of
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a shared library
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*/
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2004-05-26 18:12:49 +02:00
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C_MODE_START
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2000-07-31 21:29:14 +02:00
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#include <signal.h>
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#define MAX_SIGNALS 10 /* Max signals under a dont-allow */
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#define MIN_KEYBLOCK (min(IO_SIZE,1024))
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#define MAX_KEYBLOCK 8192 /* Max keyblocklength == 8*IO_SIZE */
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#define MAX_BLOCK_TYPES MAX_KEYBLOCK/MIN_KEYBLOCK
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struct st_remember {
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int number;
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sig_handler (*func)(int number);
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};
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2002-08-17 04:18:06 +02:00
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/*
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2003-06-12 21:39:45 +02:00
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Structure that stores information of a allocated memory block
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The data is at &struct_adr+sizeof(ALIGN_SIZE(sizeof(struct irem)))
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The lspecialvalue is at the previous 4 bytes from this, which may not
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necessarily be in the struct if the struct size isn't aligned at a 8 byte
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boundary.
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2002-08-17 04:18:06 +02:00
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*/
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2003-06-12 21:39:45 +02:00
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struct st_irem
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2002-08-17 04:18:06 +02:00
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{
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2003-06-12 21:39:45 +02:00
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struct st_irem *next; /* Linked list of structures */
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struct st_irem *prev; /* Other link */
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char *filename; /* File in which memory was new'ed */
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2008-08-19 15:56:41 +02:00
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size_t datasize; /* Size requested */
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2003-06-12 21:39:45 +02:00
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uint32 linenum; /* Line number in above file */
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uint32 SpecialValue; /* Underrun marker value */
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2000-07-31 21:29:14 +02:00
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};
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extern char NEAR curr_dir[FN_REFLEN],NEAR home_dir_buff[FN_REFLEN];
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extern volatile int _my_signals;
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extern struct st_remember _my_sig_remember[MAX_SIGNALS];
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extern const char *soundex_map;
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extern USED_MEM* my_once_root_block;
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extern uint my_once_extra;
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WL#3817: Simplify string / memory area types and make things more consistent (first part)
The following type conversions was done:
- Changed byte to uchar
- Changed gptr to uchar*
- Change my_string to char *
- Change my_size_t to size_t
- Change size_s to size_t
Removed declaration of byte, gptr, my_string, my_size_t and size_s.
Following function parameter changes was done:
- All string functions in mysys/strings was changed to use size_t
instead of uint for string lengths.
- All read()/write() functions changed to use size_t (including vio).
- All protocoll functions changed to use size_t instead of uint
- Functions that used a pointer to a string length was changed to use size_t*
- Changed malloc(), free() and related functions from using gptr to use void *
as this requires fewer casts in the code and is more in line with how the
standard functions work.
- Added extra length argument to dirname_part() to return the length of the
created string.
- Changed (at least) following functions to take uchar* as argument:
- db_dump()
- my_net_write()
- net_write_command()
- net_store_data()
- DBUG_DUMP()
- decimal2bin() & bin2decimal()
- Changed my_compress() and my_uncompress() to use size_t. Changed one
argument to my_uncompress() from a pointer to a value as we only return
one value (makes function easier to use).
- Changed type of 'pack_data' argument to packfrm() to avoid casts.
- Changed in readfrm() and writefrom(), ha_discover and handler::discover()
the type for argument 'frmdata' to uchar** to avoid casts.
- Changed most Field functions to use uchar* instead of char* (reduced a lot of
casts).
- Changed field->val_xxx(xxx, new_ptr) to take const pointers.
Other changes:
- Removed a lot of not needed casts
- Added a few new cast required by other changes
- Added some cast to my_multi_malloc() arguments for safety (as string lengths
needs to be uint, not size_t).
- Fixed all calls to hash-get-key functions to use size_t*. (Needed to be done
explicitely as this conflict was often hided by casting the function to
hash_get_key).
- Changed some buffers to memory regions to uchar* to avoid casts.
- Changed some string lengths from uint to size_t.
- Changed field->ptr to be uchar* instead of char*. This allowed us to
get rid of a lot of casts.
- Some changes from true -> TRUE, false -> FALSE, unsigned char -> uchar
- Include zlib.h in some files as we needed declaration of crc32()
- Changed MY_FILE_ERROR to be (size_t) -1.
- Changed many variables to hold the result of my_read() / my_write() to be
size_t. This was needed to properly detect errors (which are
returned as (size_t) -1).
- Removed some very old VMS code
- Changed packfrm()/unpackfrm() to not be depending on uint size
(portability fix)
- Removed windows specific code to restore cursor position as this
causes slowdown on windows and we should not mix read() and pread()
calls anyway as this is not thread safe. Updated function comment to
reflect this. Changed function that depended on original behavior of
my_pwrite() to itself restore the cursor position (one such case).
- Added some missing checking of return value of malloc().
- Changed definition of MOD_PAD_CHAR_TO_FULL_LENGTH to avoid 'long' overflow.
- Changed type of table_def::m_size from my_size_t to ulong to reflect that
m_size is the number of elements in the array, not a string/memory
length.
- Moved THD::max_row_length() to table.cc (as it's not depending on THD).
Inlined max_row_length_blob() into this function.
- More function comments
- Fixed some compiler warnings when compiled without partitions.
- Removed setting of LEX_STRING() arguments in declaration (portability fix).
- Some trivial indentation/variable name changes.
- Some trivial code simplifications:
- Replaced some calls to alloc_root + memcpy to use
strmake_root()/strdup_root().
- Changed some calls from memdup() to strmake() (Safety fix)
- Simpler loops in client-simple.c
2007-05-10 11:59:39 +02:00
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extern uchar *sf_min_adress,*sf_max_adress;
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2003-06-12 21:39:45 +02:00
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extern uint sf_malloc_count;
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extern struct st_irem *sf_malloc_root;
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2000-07-31 21:29:14 +02:00
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2004-02-19 18:33:09 +01:00
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extern struct st_my_file_info my_file_info_default[MY_NFILE];
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2007-07-30 10:33:50 +02:00
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extern ulonglong query_performance_frequency, query_performance_offset;
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2000-07-31 21:29:14 +02:00
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#if defined(THREAD) && !defined(__WIN__)
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extern sigset_t my_signals; /* signals blocked by mf_brkhant */
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#endif
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2004-05-26 18:12:49 +02:00
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C_MODE_END
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